This dissertation investigates the ecology and distribution of amphibians, parasites, and their interactions within aquatic ecosystems. Throughout my dissertation, I use quantitative tools and field observations to examine the factors limiting distributions of amphibians and the…
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Owen Sound Bay, which is located within the traditional territory of the Saugeen Ojibway Nation (SON), is contaminated as a result of historical industrial and shipping activity. Gross contamination of the sediments in the inner part of the Bay (i.e., Owen Sound Harbour) include…
Desert fishes are some of the most threatened species in the world because of anthropogenic alterations and competition for limited freshwater. Among threatened desert fishes is the Yaqui Catfish, Ictalurus pricei , which is native to southwest United States and northwestern Mex…
The Spring River, located within the Interior Highlands, supports one of the most biodiverse fish faunas (137 species) within Arkansas. However, threats to the fish communities include chronic pasture land-use and potential fish introductions from farm ponds within the watershed…
Bivalve shellfish aquaculture provides many benefits to society, beyond their traditional market value. This thesis reviews and collates the evidence and valuations available on the provisioning, regulating and cultural ecosystem services provided by bivalve aquaculture species.…
Evidence is presented that fish populations globally are susceptible to endangerment through exploitation and habitat loss. Theoretical simulations are presented to explore how reduced adult survival (age truncation) might affect short-lived freshwater fish species in human-alte…
Many marine species make use of the expanse of the ocean by traveling great distances to fulfill life history requirements. The blacktip shark, Carcharhinus limbatus, is a medium sized species associated near the coast found circumglobally in temperate waters. In the northwester…
Yellowtail snapper Ocyurus chrysurus is an important fisheries species in the US Caribbean; in waters of Puerto Rico, it ranks second for reef fishes in terms of annual total commercial landings. However, a paucity of information exists concerning basic life history information …
Metacommunities are spatially structured communities linked by dispersal. They provide a connection between local community assembly and regional-level processes. However, very little information exists on how metacommunity structure and associated structuring mechanisms changes…
Co-management is a governance approach that emphasizes sharing of decision-making power and authority between communities and state agencies. Over the past decades, this approach has been applied to the management of various types of common pool resources including fisheries. Ho…
The Egyptian Environmental Affairs Agency (EEAA) declared Ras Mohamed National Park the first Marine Protected Area (MPA) in Egypt in 1983 to conserve the Gulf of Aqaba coral reef ecosystem, sustain artisanal fisheries and encourage tourism activities in this region. The Europea…
Infectious diseases are significant impediments to the growth and sustainability of commercial shrimp aquaculture. Endemic diseases such as that caused by the obligate intracellular parasite the Necrotizing Hepatopancreatitis Bacterium (NHPB), cause significant losses to shrimp …
This study has two main purposes. The first one is to explore various catalysts for transesterification process in neem biodiesel production. Two types of neem oil, with different water content, were used as the feedstock. Attention was mainly focused on the organic base TBAH an…
Aquaponics is an environmentally friendly and sustainable technology that holds promise to promote global food production. However, in aquaponics, routine fish feeding, along with the natural phenomena of evaporation and transpiration from the water and plants, could lead to det…
In a world where development choices are predominantly shaped by capitalist economic values, the importance of spiritual values in maintaining individual and community identity and culture is often overlooked. Being conscious of the relationship between the island environment an…
The importing of tra, basa, and channel catfish at relatively lower prices has resulted in less catfish purchased from U.S. farmers and processors. Claims have been filed with the U.S. International Trade Commission (ITC) accusing Vietnamese exporters of selling catfish to the U…
Aquatic macroinvertebrates are well-established biological indicators of water quality and a major component of water quality assessment of flowing waters because of their ability to detect and integrate natural and anthropogenic changes in physical and chemical habitat. The New…
The impacts of climate change and anthropogenic disturbance are pervasive throughout ecosystems. Yet particularly in aquatic and marine systems, animal responses to the resulting environmental changes can be difficult to determine, which inhibits appropriate management strategie…
Climate change poses a growing threat to freshwater ecosystems and water quality. This dissertation examines the relationship between changes in climate and two key water quality parameters: the transport of nitrogen within rivers, referred to as nitrogen loading, and river temp…